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GEORGE \V. SI'IEM, OF CAMDEN, NEW JERSEY, ASSIGNOR TO TIIE CAMDEN IRON\VORKS, OF SAME PLACE.

HYDRAULIC INTENSIFlER.

SPECIFICATION forming part of Letters Patent No. 584,712, dated June 15,1897. Application filed December t, 1896. Serial No. 614,517. (Nomodel.)

To ctZZ whom it may concern: for the intermediate ram 7, which is alsopro- Be it known that I, GEORGE W. SHEM, a vided at its outer end with astuffing-box for citizen of the United States, and a resident of theinnermost ram 8, the latter having at the Camden, New Jersey, haveinvented certain outer end a stuffingbox fora tubular plunger 5Improvements in Hydraulic Intensifiers, of 9, which is rigidly securedat its outer end to which the following is a specification. thecross-head 4., the innerend of the plunger My invention relates to thatclass of presopening into the chamber within the ram 8, sure devicesknown as hydraulic intensiwhile the outer end of the plungercommuniiiers, the purpose of which is to cause a volcates in anyavailable way with the connec- I0 ume of fluid under pressure to impartto a tion into which fluid under high pressure is second volume of fluida pressure in excess of to be forced. the initial pressure. Mounted uponthe outer end of the ram 6, so The object of my invention is to so conastobe capableofturningthereon,isaringlO, struct apparatus of thischaracteras to readily with thickened portions or lugs 11, and simi- [5regulate the degree of pressure imparted to larly mounted upon the outerend of the ram the secondary volume of fluid; and this ob- 7 is a likering 12,and on the sleeves 5, which ject I attain in the mannerhereinafter set surround the connecting-bolts 2,areinwardlyforth,reference being had to the accompanyprojecting lugs 13 and 14, theformer being ing drawings, in which adapted to engage with the lugs 11of the ring 20 Figure 1 is a longitudinal sectional view of 12, whilethe lugs 14 are adapted to engage ahydranlic intensifier constructed inaccordwith the lugs of the ring 10 when the rams '6 ance with myinvention. Fig. 2 is a transand 7 are in their innermost position. versesection of the same on the line 00 as, Fig. Supposing that the parts arein the position 1. Fig. 3 is a view of a locking-ring such as shown inFig. 1 and that the chamber of the z 5 is employed in connectionwithcertain of the hollow ram 8 is filled with the fluid to which ramsof the intensifier, and Fig. 4 is aview pressure is to be imparted, therams 6 and"? illustrating a modification of the invention. are locked tothe sleeves 5 by reason of the The main cylinder 1 of the apparatus hasengagement of their rings 10 and 12 with the at the upper end a heavyflange 2, which is lugs let and13 of said sleeves. Hence the fluid ,0connected by means of bolts 3 to a substanunder initial pressureadmitted to the cylintial cross-head 4:, located at such a distance der1 through the opening 15 can project only from the main cylinder as thedesired stroke the innermost ram 8, and the pressure imof the rams maysuggest. Interposed beparted to the fluid within said ram 8 will between the flange 2 of the cylinder 1 and the governed by the differencebetween the area 5 cross-head 4 are sleeves '5, which surround of theplunger 9 and the area presented by the bolts 2 and serve to hold thecross-head the ram 8. If a greater pressure is desired, drigidlyin itsproperrelation to the cylinder 1. the ram 7 may be unlocked by turningits \Vithin the cylinder 1 are, in the present ring 12, by means ofahandle 16, untilthe lugs instance, three hollowrams 6, 7, and 8 of dif-11 of said ring are free from engagement with o ferent diameters,theserams fitting one within the lugs 13 of the sleeves 5, whereupon the theother telescopically, and the rams 6 and 7 ram 7 will be free to moveand the effective being open at the inner end, While the ram 8 areaexposed to the pressure within the cylis closed at the inner end. inder1 will be increased correspondingly, and

The ram 7 is internally shouldered near its in like manner a furtherincrease of pressure 5 5 inner end, so as to provide a bearing for themay be obtained by unlocking the ram 6 by ram 8, and in like manner theram 6 is interturning its ring 10 so as to release its lugs 11nally'shouldered to provide a bearin g for the fromthe control of thelugs 14:. Hence the ram 7. pressure may be graduated to accord with Thecylinder 1 has at the outer end a stuffany requirement without using anymore fluid o 1ng-boX for the outer or largest ram 6, and of initialpressure than is necessary for the the latter has at its outer end astuffing-box purpose.

Although I have shown an apparatus employing but three rams, it will beevident that the number of rams may be multiplied to any desired extent,or, on the other hand, my invention may be embodied in an intensifierhaving but two rams, and various means of locking the rams in positionmay be resorted to. For instance, where the sleeves 5 are not used, theretaining-lugs may be formed directly upon the connecting-bolts 2, orspecial bolts may project from the flange of the cylinder 1 forengagement with the flanged outer ends of the rams, as shown, forinstance, at 14 in Fig. 4.

Having thus described my invention, I claim and desire to secure byLetters Patent 1. The combination in a hydraulic intensifier, of theinitial-pressure cylinder, a plurality of rams telescopically arrangedtherein the central ram being hollow and containing the chamber in whichthe increased pressure is generated, a fixed plunger closing the outerend of said central hollow ram, an outlet from said ram, and provisionfor lockin g and releasing the rams surrounding the central hollow ram,whereby the initial pressure may be exerted throughout the areapresented by any one of the rams to generate pressure upon the fluidcontained in the central hollow ram, substantially as specified.

2. The combination in a hydraulic intensifier, of the initial-pressurecylinder, a plurality of rams telescopically arranged therein,

the central ram being hollow and containing H the chamber in which theincreased pressure is generated, and each of the surrounding rams havingan internal shoulder acting as a stop to limit the inward movement ofthe ram contained within it, an outlet from the central hollow ram, afixed plunger closing the outer end of said central hollow ram, andprovision for locking and releasing the rams surrounding the centralhollow ram, substantially as specified.

The combination in a hydraulic intensifier, of the initial-pressurecylinder, a plurality of rams telescopically arranged therein, a plungerentering the central ram in which increased pressure is generated, anoutlet from said central ram, a cross-head carrying the said plunger andconnected to the cylinder by bolts, sleeves surrounding said bolts andhaving projectinglugs thereon, and rings revolubly mounted upon the ramsand having projecting portions for engaging with the lugs on thesleeves, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE \V. SIIEM.

IVitnesses:

Jos. II. KLEIN, F. E. BEoHToLn.

